The population distribution of Canada and the United States is similar because most of the population is concentrated — a along the border
b near the coastlines
c in large urban centers
d throughout the Great Plains

Correct answer is C. in large urban centers

Explanation:

First option is not correct as although most of the population in Canada is located near the border, that is not the case with United States.

B is also not correct as while in United States we have large cities on the coast like Boston of Los Angeles, that is not the case in Canada.

C is correct as most of the population is distributed in the large megapolis, such as Montreal, Toronto, New York, Los Angeles...

D is also not correct as not so many people is living in that area in contrast to other regions.

The answer is (6,1)

If you'd like to know why:

Starting equation: Our first step is to simplify this by grouping the x's and the y's and moving our constant (+12) to the other side of the equation. This gives you : Our next step is to figure out what to use to finish the square. This can be found by dividing our value directly in front of the variable, by two and then squaring that answer. And taking the two values we end up with then adding them to the tail end of our equation. Using this we end up with: Next we simplify the tail end of our equation: Now to simplify this further we have to find a number that fits into both parts of the parentheses. Since I'm not totally sure how to explain this i'll give you my simple method: Take the value directly in front of the variable and reduce it by half. This will be the number you need. This gives us: To finish you find the center of the circle which is the part that likes to trip people up, basically you have to change the sign in front of our desired values in order for it to be correct, which leaves you with what I said the answer was before (6,1)

I tried my best to explain this so you can use it on more questions, also I just took the quiz so I know for sure that it is correct.

I hope this helps :)